Fowler, W. S., Pidcock, J., & Yorkey, R. C. Incentive themes. Book 4, teacher´s edition.
Lua i Stíl Chicago (17ú heag.)Fowler, W. S., J. Pidcock, agus Richard C. Yorkey. Incentive Themes. Book 4, Teacher´s Edition.
Lua MLA (8ú heag.)Fowler, W. S., et al. Incentive Themes. Book 4, Teacher´s Edition.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.